hi there any advice on training . is it best to go for one to one or group training my cocker is comming up for 12 weeks .thanks

I feel that group training is best, but continuing one to one when you are at home. Group training means that he will be in an environment where there are distractions and that is the case of everyday life. Getting him used to being well trained around other dogs etc (when he will want to play/sniff/fight etc, you want to have him so that he obeys you).
Good luck with him